Buggy code:
public class BuildMetaMethod extends MetaMethod implements Builder { private Context context ; private BuildMetaClass declaringClass ; private Statement body ; private Scope scope ; private DefModifiers modifiers ; private String name ; private MetaClass returnType ; private DefParameters defParameters ; private MetaType genericReturnType ; private List < MetaType > genericParameterTypes ; private ThrowsDeclaration throwsDeclaration ; private MetaMethod reifiedFormOf ; public BuildMetaMethod ( BuildMetaClass declaringClass , Statement body , Scope scope , DefModifiers modifiers , String name , MetaClass returnType , MetaType genericReturnType , DefParameters defParameters , ThrowsDeclaration throwsDeclaration ) { } @ Override public String getName ( ) { } @ Override public MetaClass getReturnType ( ) { } @ Override public MetaType getGenericReturnType ( ) { } @ Override public MetaType [ ] getGenericParameterTypes ( ) { } @ Override public MetaParameter [ ] getParameters ( ) { } @ Override public MetaClass getDeclaringClass ( ) { } @ Override public boolean isAbstract ( ) { } @ Override public boolean isPublic ( ) { } @ Override public boolean isPrivate ( ) { } @ Override public boolean isProtected ( ) { } @ Override public boolean isFinal ( ) { } @ Override public boolean isStatic ( ) { } @ Override public boolean isTransient ( ) { } @ Override public boolean isSynthetic ( ) { } @ Override public boolean isVolatile ( ) { } @ Override public boolean isSynchronized ( ) { } @ Override public Annotation [ ] getAnnotations ( ) { } @ Override public boolean isAnnotationPresent ( Class < ? extends Annotation > annotation ) { } @ Override public < A extends Annotation > A getAnnotation ( Class < A > annotation ) { } @ Override public MetaTypeVariable [ ] getTypeParameters ( ) { } @ Override public MetaClass [ ] getCheckedExceptions ( ) { } public void setDeclaringClass ( BuildMetaClass declaringClass ) { } public void setScope ( Scope scope ) { } public void setName ( String name ) { } public void setReturnType ( MetaClass returnType ) { } public void setGenericReturnType ( MetaType genericReturnType ) { } public void setGenericParameterTypes ( List < MetaType > genericParameterTypes ) { } public void setBody ( Statement body ) { } public void setDefParameters ( DefParameters defParameters ) { } public void setThrowsDeclaration ( ThrowsDeclaration throwsDeclaration ) { } public boolean isReifiedForm ( ) { } public MetaMethod getReifiedFormOf ( ) { } public void setReifiedFormOf ( MetaMethod reifiedFormOf ) { } @ Override public String toJavaString ( ) { this . context = Context . create ( declaringClass . getContext ( ) ) ; for ( Parameter p : defParameters . getParameters ( ) ) { context . addVariable ( Variable . create ( p . getName ( ) , p . getType ( ) ) ) ; } StringBuilder buf = new StringBuilder ( 256 ) . append ( scope . getCanonicalName ( ) ) . append ( "<seq2seq4repair_space>" ) ; buf . append ( modifiers . toJavaString ( ) ) . append ( "<seq2seq4repair_space>" ) ; <START_BUG> buf . append ( LoadClassReference . getClassReference ( returnType , context ) ) . append ( "<seq2seq4repair_space>" ) . append ( name ) . append ( defParameters . generate ( context ) ) ; <END_BUG> if ( ! ( throwsDeclaration . isEmpty ( ) ) ) { buf . append ( "<seq2seq4repair_space>" ) . append ( throwsDeclaration . generate ( context ) ) ; } if ( modifiers . hasModifier ( Abstract ) ) { buf . append ( ";" ) ; } else if ( modifiers . hasModifier ( JSNI ) ) { buf . append ( "<seq2seq4repair_space>//*-{\n" ) . append ( body . generate ( context ) ) . append ( "\n}-*//;\n" ) ; } else { buf . append ( "<seq2seq4repair_space>{\n" ) . append ( body . generate ( context ) ) . append ( "\n}\n" ) ; } return buf . toString ( ) ; } @ Override public boolean equals ( Object o ) { } public String toString ( ) { } }

Fix:
buf . append ( LoadClassReference . getClassReference ( returnType , context , false ) ) . append ( "<seq2seq4repair_space>" ) . append ( name ) . append ( defParameters . generate ( context ) ) ;